python中RabbitMQ的使用（路由键模糊匹配）

路由键模糊匹配

使用正则表达式进行匹配。其中“#”表示所有、全部的意思；“*”只匹配到一个词。

匹配规则：

路由键：routings = [ 'happy.work', 'happy.life' , 'happy.work.teacher', 'sad.work', 'sad.life', 'sad.work.teacher' ]

"#"：匹配所有的路由键

"happy.#"：匹配 'happy.work', 'happy.life' , 'happy.work.teacher'

"work.#"：无匹配

“happy.*”：匹配 'happy.work', 'happy.life'

"*.work"：匹配 'happy.work', 'sad.work'

"*.work.#"：匹配 'happy.work', 'happy.work.teacher', 'sad.work', 'sad.work.teacher'

示例代码：

send4.py:

 1 #!/usr/bin/env python
 2 # -*- coding: utf-8 -*-
 3 import pika
 4 
 5 hostname = '192.168.1.133'
 6 parameters = pika.ConnectionParameters(hostname)
 7 connection = pika.BlockingConnection(parameters)
 8 
 9 # 创建通道
10 channel = connection.channel()
11 # 定义交换机，设置类型为topic
12 channel.exchange_declare(exchange='change_top', type='topic')
13 
14 # 定义路由键
15 routings = ['happy.work', 'happy.life', 'sad.work', 'sad.life']
16 
17 # 将消息依次发送到交换机，并设定路由键
18 for routing in routings:
19     message = '%s message.' % routing
20     channel.basic_publish(exchange='change_top', routing_key=routing, body=message)
21     print message
22 
23 connection.close()

receive4.py:

 1 #!/usr/bin/env python
 2 # -*- coding: utf-8 -*-
 3 import pika
 4 import sys
 5 
 6 hostname = '192.168.1.133'
 7 parameters = pika.ConnectionParameters(hostname)
 8 connection = pika.BlockingConnection(parameters)
 9 
10 # 创建通道
11 channel = connection.channel()
12 # 定义交换机，设置类型为topic
13 channel.exchange_declare(exchange='change_top', type='topic')
14 
15 # 从命令行获取路由参数，如果没有，则报错退出
16 routings = sys.argv[1:]
17 if not routings:
18     print >> sys.stderr, "Usage: %s [routing_key]..." % (sys.argv[0],)
19     exit()
20 
21 # 生成临时队列，并绑定到交换机上，设置路由键
22 result = channel.queue_declare(exclusive=True)
23 queue_name = result.method.queue
24 for routing in routings:
25     channel.queue_bind(exchange='change_top', queue=queue_name, routing_key=routing)
26 
27 
28 def callback(ch, method, properties, body):
29     print " [x] Received %r" % (body,)
30 
31 
32 channel.basic_consume(callback, queue=queue_name, no_ack=True)
33 
34 print ' [*] Waiting for messages. To exit press CTRL+C'
35 channel.start_consuming()

打开四个终端，运行一下命令：

发送端：

接收端：